/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.classfile.attribute.visitor;

import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.util.SimplifiedVisitor;
import proguard.classfile.visitor.*;

/**
 * This ClassVisitor, MemberVisitor, and AttributeVisitor lets a given AttributeVisitor visit all Attribute objects of
 * the program classes, program class members, or code attributes, respectively, that it visits.
 *
 * @author Eric Lafortune
 */
public class AllAttributeVisitor extends SimplifiedVisitor implements ClassVisitor, MemberVisitor, AttributeVisitor {
    private final boolean deep;
    private final AttributeVisitor attributeVisitor;

    /**
     * Creates a new shallow AllAttributeVisitor.
     * 
     * @param attributeVisitor the AttributeVisitor to which visits will be delegated.
     */
    public AllAttributeVisitor(AttributeVisitor attributeVisitor) {
        this(false, attributeVisitor);
    }

    /**
     * Creates a new optionally deep AllAttributeVisitor.
     * 
     * @param deep specifies whether the attributes contained further down the class structure should be visited too.
     * @param attributeVisitor the AttributeVisitor to which visits will be delegated.
     */
    public AllAttributeVisitor(boolean deep, AttributeVisitor attributeVisitor) {
        this.deep = deep;
        this.attributeVisitor = attributeVisitor;
    }

    // Implementations for ClassVisitor.

    public void visitProgramClass(ProgramClass programClass) {
        programClass.attributesAccept(attributeVisitor);

        // Visit the attributes further down the class structure, if required.
        if (deep) {
            programClass.fieldsAccept(this);
            programClass.methodsAccept(this);
            programClass.attributesAccept(this);
        }
    }

    public void visitLibraryClass(LibraryClass libraryClass) {}

    // Implementations for MemberVisitor.

    public void visitProgramMember(ProgramClass programClass, ProgramMember programMember) {
        programMember.attributesAccept(programClass, attributeVisitor);

        // Visit the attributes further down the member structure, if required.
        if (deep) {
            programMember.attributesAccept(programClass, this);
        }
    }

    public void visitLibraryMember(LibraryClass programClass, LibraryMember programMember) {}

    // Implementations for AttributeVisitor.

    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}

    public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute) {
        codeAttribute.attributesAccept(clazz, method, attributeVisitor);
    }
}
